Combined bell and door-knob.



'No. 718,432. a

T. E. GREGELIUS & G. B. PFENNIGHAUSEN.

COMBINED BELL AND DOOR KNOB.

APPLICATION FILED MAR. 17, 1902.

N0 MODEL.

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NliT-ED STATES PATENT ()FFICE.

THEODORE E. ORECELIUS AND GOTHARD E. PFENNIGHAUSEN, OF ST. LOUIS,MISSOURI. I

COMBINED BELL AND DOOR-KNOB.

SPECIFICATION forming part of Letters Patent No. 718,432, dated January13, 1903.

Application filed March 17, 1902. Serial No. 98,653. (No model.)

To all whom it may concern:

Be it known that we, THEODOREE. CRECE- LIus and GOTHARD E.PFENNIGHAUSEN, of the city of St. Louis, State of Missouri, haveinvented certain new and useful Improvements in a Combined Bell andDoor-Knob, of which the following is a full, clear, and exactdescription, reference being bad to the accompanying drawings, forming apart hereof.

Our invention relates to combined bells and door-knobs; and it consistsof the novel construction, combination, and arrangement of partshereinafter shown, described, and claimed.

Our object is to provide an improved device and place a bell on thedoor-knob, so that every time the knob'is operated to latch and unlatchthe door the bell will ring; and our invention consists of thecombination, with the shaft of a door-knob, of a clapperbase mountedloosely upon the shaft and held against rotation, a bell fixed upon theshaft and serving as a substitute for one of the knobs, posts extendingoutwardly from said base, clappers mounted upon said posts in positionto engage the bell, balanced springs connecting said clappers to theposts, said springs being coiled cone-shaped, the small outer ends ofthe cones fitting tightly upon the posts and the extreme outer endsofthe wires being placed against the end faces of the posts and solderedand the opposite ends of the wires being connected to the clappers, saidsprings being adjusted to hold the clappers in their normal centralposition, cams for operating said clappers, and an arm fixed upon theshaft of the door-knob for operating the cams. I

Figure 1 is an edge elevation of a door, showing the knobs on each sideof the door, parts of the door being broken away. Fig. 2 is a View inelevation, showing the clapper-base with the clappers and cam mountedthereon. Fig. 3 is a central section on the line 3 3 of Fig. 1. Fig. 4is an edge view as seen looking in the direction indicated by the arrowin Fig. 2. Fig. 5 isa plan of a modified construction.

Referring to the drawings in detail, the clapper-base 6 is looselymounted upon the shaft 7 of the door-knob, and the arm 8 exthe base 6,and the balanced springs 14: and

15 connect said clappers to said posts, said springs being balanced andadjusted to hold the clappers out of engagement with the rim of thebell. The balanced springs are coiled cone shaped, the small outer endof the cone fitting tightly upon the posts, and the extreme outer end'ofthe wire is placed against the end face of the post and soldered, andthe opposite end of the wire extending from the large end of the cone isattached to the clap per. The clapper is placed upon the post and movedto its central position. Then the spring is placed upon the post andattached to the clapper and then soldered, thus holding the clapperyieldingly in its normal central position, and the tension of the springmust be overcome to move the clapper in either direction. The arms 16and 17 extend from the clappers 10 and 11 at an angle thereto. Thecam-plate 18 is pivotally mounted upon the screw 19, secured to the base6, and the cams 20 and 21 project from said cam-plate in position toengage the arms 16 and 17 as the plate is rocked upon its pivot. Thepoints of the cams 20 and 21 are of such a length relative to the pointsof the arms 16 and 17 that when the cam-plate is rocked upon its pivotthe point 20 will operate the arm 16 to wind up the spring 14 and thensnap by said arm, thus releasing the spring and allowing the clapper tostrike the bell. The same is true of the point of the cam 21 relative tothe arm 17.

The arms 22 and 23 extend outwardly from the plate 18, and the arm 24,fixed upon the shaft 7, extends outwardly over the plate 18 and thendownwardly to engage the arms 22 and 23 as required to rock thecam-plate 18 upon its pivot when the shaft 7 isrotated to latch orunlatch the door.

In Fig. 2 the clappers are mounted inside of the bell, and in Fig. 5 theclapper 10is mounted upon the post 12 outside the bell, and the cam 20is mounted upon a post 25 and held in its normal position by thebalanced spring The 26, and said cam may be manually operated by thehandle 27. The spring 26 is identical with the springs 14 and 15. Thepoint of the cam is in position to engage the point of the arm 16, movethe clapper away from the bell, as shown in dotted lines, then snap byand allow the spring 14 to throw the clapper against the bell.

We claim 1. In a device of the class described, the combination with theshaft of a door-knob; of a clapper-base mounted loosely upon the shaftand held against rotation; a bell fixed upon the shaft and serving as asubstitute for one of the door-knobs; posts extending outwardly from thebase; clappers mounted upon said posts; independent balanced springsholding said clappers normally out of contact with the bell, saidsprings being coiled cone-shaped, the small outer ends of the conesfitting tightly upon the posts, and the extreme outer ends of the wiresbeing soldered against the end faces of the posts, and the opposite endsof the wires connected to the clappers; cams for operating saidclappers; and an arm fixed upon said shaft for operating the cams,substantially as specified.

2. In a bell, a post; a clapper pivotally mounted upon the post; asingle independent balanced spring connecting the clapper to the post,said spring being coiled cone-shaped, the small outer end of the conefitting tightly upon the post, and the extreme outer end of the Wiresoldered against the end face of the post, and the opposite end of thewire connected to the clapper, said spring being adjusted to hold theclapper in its normal central position; an arm extending from theclapper at an angle thereto; and means of tripping said arm to operatethe clapper, substantially as specified. t

3. In a bell, a clapper pivotally mounted; and a single independentbalanced spring holding the clapper yieldingly in its normal centralposition, so that the clapper may swing either Way against the tensionof the spring, substantially as specified.

In testimony whereof we alfix our signatures in presence of twowitnesses.

THEODORE E. GRECELIUS. GOTIIARD E. PFENNIGHAUSEN.

Witnesses:

ALFRED A. EICKS, M. G. IRION.

